Currying breaks down a function that receives multiple arguments into a series of functions that each receive part of the arguments.

Named after Haskell Curry, if we have f::(x, y) -> z, when curried we get curry(f) :: x -> y -> z.

ES6 Implementation

let curry1 = f => (a) => f(a);

let curry2 = f => (...a) => (...b) => f(...a, ...b);

let curry3 = f => (...a) => (...b) => (...c) => f(...a, ...b, ...c);

## nCurry for Any Arity
javascript
let nCurry = n => (f, ...args) => {
  return function(...nargs) {
    let combinedArgs = args.concat(nargs);
    if (combinedArgs.length < n) {
      combinedArgs.unshift(f);
      return nCurry(n).apply(null, combinedArgs);
    }
    return f.apply(null, combinedArgs);
  };
};

// Usage: nCurry(4)(listify)(1)(2)(3)(4); // [1,2,3,4]

Hope you enjoyed your curry! 🍛